The Ghostwise halflings are wild, nearly feral halflings who rarely leave the confines of the deep forests.
Strange and reclusive, they form close-knit communities because of their amazing talents and are uncomfortable with strangers. Their culture is almost entirely cut off from the outside world and their awareness of other kinds of halflings is very low. A ghostwise halfling, unlike other halflings, can communicate telepathically with any creature within 20 feet, just as if speaking to him or her (use tells in role-play).

[Source: Forgotten Realms Campaign Setting by Greenwood, Reynolds, Williams, and Heinsoo, published by Wizards of the Coast, page 17-18.]